I agree that WB options vary from camera model to model! This means that it is impossible to provide generic advice.
I tend to keep the camera pretty still whie shooting and shoot short sequences and find that this helps to minimizes WB shifts. There are exceptions, like when there is bright sunlight filtering through the water, but arguably, fixed WB will produce funky color cast in this situation too.
The blue keldan light filters correct the light's output to reflect the actual color temperature of the ambient light at depth. This produces a natural looking scene.